Equivalent Circuit Models for Soils and Aqueous Solutions Under 2-Terminal Test Configuration

Numerous circuit models have been proposed to represent the electrode–electrolyte interface (EEI) impedance and bulk medium of conducting media. Following a review, two suitable are constructed behavior conduction in electrolytes soils, respectively. Both incorporate constant phase element parallel with an apparent Faradaic resistance, which is found reproduce EEI accurately. For electrolyte model, single R-C branch added medium, whereas for soil equivalent ladder network xmlns:xlink="http://www.w3.org/1999/xlink">R - xmlns:xlink="http://www.w3.org/1999/xlink">C branches be suitable. Experimentally obtained data based on 2-terminal spectroscopy over frequency range 10 mHz MHz variable current density compared values from where model parameters determined by curve fitting routine. The effects concentration, moisture, electrode material analyzed, help illustrate clearly how effect dominates at low frequencies while intrinsic characteristics test prevails high frequencies. extended account soil-electrolyte dependence density, most evident extent plateau region described limiting upper lower